Perforating-machine.



A. G. STONE. PERFORATING MACHINE. APPLIOATION FILED 111111.23, 1911.

' 1,015,356, Patented Jan.23,1912.

2 SHEETS-SHEET 1.

witnesses: a @5522?) g M A. c.- STONE. PERPORATING MACHINE. APPLICATION FILED MAR.23, 191i.

2 SHEETS-SHEET 2.

witnesses:

Patented Jan. 23, 1912.

Inventor: W i am C. QF;/uv\1- UNITED STATES PATENT 10mm. 2f

ARTHUR o. s'ronn, orrnovinnncn, RHODE Is Ann;

1 PERFORATING-MACHINE.

1 moval of a large proportion of the original surface by a large number of perforations, it is necessary to perform successive operations, for the reason'that the material of the die-plate is not strong enough to permit the performance of the entire perforating operation at a single stroke. For example, considering the work to be done as the production from a blank such asshown in 3, of the perforated disk shown in Fig. 7, it has not been found possible to produce the forty perforations therein shown at a single v stroke by means of forty punches cooperating with a die-plate provided with forty;

corresponding dies. f I

By means of my present invention I am enabled to produce the perforated disk shown in Fig. 7 with only ten punches and dies instead of forty, thereby greatly reducing the costof the apparatus.-- I also effect a considerable saving in time of handling and in the set-ting of the dies and punches, inasmuch as the work is all performed in a single machine. r

In the drawings which accompany and form a part of this specification, Figure 1 is a section of the die-plate and its cooperating punching head and the workholder with an unpunched disk in place, the other parts of the machine beingomitted for the sake of clearness. Fig. 2 is a plan view of the dieplate and work holder with said i disk omitted. Fig. 3 is a plan view of .a blank,

illustrating the principle of my invention, 1 1 represents a bed-plate to which the die-plate 2 is secured in any suitable manner, as for example by the screws 3.

Specification of Letters Patent.

- 4;i-s a work-holder arranged axially'with Patented J an. 23, 1912; Application filed March 23, 1911. SerialiNo. 616,534.

respect-to said die-plate and provided with a handle 5, or other suitable means whereby it may be intermittently rotated with respect to the dieqolate. "When placed in the desired position, it is locked by the detent 6 which cooperates with one of the notches 7 in the periphery of the work-holder and carrieit The work-holder isprovided with a seats for receiving the blanks 9 which are to be perforated, and when using 'a circular blank as shown, it is provided with a projecting portion 19 which fits into the indentation 19 in said seat,pso as to prevent the work from I turning in the workholder. A suitable co- 7 operating punchinghead 10 is arranged axially above the die-plate and is provided with a series of punchesll, 12 which, when the head is. forced on the die-plate, pass through the stripper l3 and then into the Work. The stripper is held away from the punches by the springs 14, and its rel tion thereto is governed in the present instance by the bolts 18'. The pins 15, of which only one ofthe notches 7.

The die-plate shown in the present stance is divisible into four quadrants, A,"B, C and D, on each of which is'placed a group of dies .which are spaced differently from 1 the dies of any other quadrant. In the present example herein specifically as:

scribed, the total number of dies in the die-' plate is ten, and the total: number of perfo.

rations in the finished product is forty.

Ten perforations are made at each stroke of the punch and the-successive appearances of,

the work after each-punching operation are shown Figs. 4, 5, 6 and 7, respectively.

I At the first stroke of the punch, the work is perforated as shown in Fig. 4. After the first stroke of the 'p unch,.the work-holder and'carrier, is given a quarter turn, and af ter the next stroke of the punch,'the work contains the perforations shown: in Fig. 5

again the work-holder is. given a quarter turn and after theithirdstroke of the punch,

the disk is perforatedas shown in Fig.6. "Then the ,"work-holder is given a final quarter turn and after theffourth stroke of the 5 0 i I punch the disk will be provided with the perforations shown in Fig. '7, the perforating operation being completed.

It will be obvious that by means of the apparatus above described, I am enabled to reduce the number and hence the cost of the punches and dies to one-fourth of that heretofore required, and also that the operations necessary to produce the finished product shown in Fig. 7 require much less time than where the work has to be removed from one machine to another after each punching operation.

It will be understood of course that while I have described with some particularity one of several forms of my invention which is now in successful commercial use, I do not desire to limit myself thereto, inasmuch as many modifications may be made therein by those skilled in the art, without departing from the fundamental principle involved.

It will further be understood that the number of punches and dies employed may vary with reference to the total number of perforations to be produced. For example, one half of the whole number may be employed, and the perforating be done with two strokes of the punch and one-half revolution of the work-holder. In like manner, punches and dies equal, to say, one-sixth of the whole number of perforations might be employed, with a corresponding increase in punch-strokes and work-holder movements.

I claim:

1. In a perforating machine, in combination, a die-plate provided with dies in number sufiicient to produce at one operation a fractional part of the total number of perforations desired, said dies being grouped symmetrically upon said die-plate, and each group being spaced differently from the rest, a punching head provided with punches corresponding to said dies, :1 work-holder arranged axially with said dieplate and punching head, and means whereby said work-holder may be rotated.

2. In a perforating machine, in combination, a die-plate provided with dies in number sufficient to produce at one oper ation a fractional part of the total number of perforations desired,said dies being grouped symmetrically upon said die-plate, and each group being spaced differently from the rest, a punching head .provided with punches corresponding to said dies, a workholder arranged axially with said die-plate and punching head, means whereby said work-holder may be rotated, and means for locking said work-holder in position.

In testimony whereof, I have hereunto subscribed my name this 11th day of March, 1911.

ARTHUR C. STONE.

Witnesses:

Gno. K. Woonwonrn, E. B. TOMLINSON.

Copies of this patent. may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, .D. C. 

